Finding the Fourth Proportional to 1,086.42, 1,629.54 and 623.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.42 : 1,629.54 = 623.02 : x
2. Step 2: Convert to fraction form
   1,086.42/1,629.54 = 623.02/x
3. Step 3: Cross multiply
   1,086.42x = 1,629.54 × 623.02
4. Step 4: Simplify right side
   1,086.42x = 1,015,236.01
5. Step 5: Solve for x
   x = 1,015,236.01/1,086.42
6. Step 6: Final answer
   x = 934.48